Bake-oven.



J. FAULDS.

BAKE- OVEN.

APPLICATION FILED JULY 5, 1912.

Patented June 16,1914.

ines es UNITED STATES PATENT OFFICE.

JQHN FAULDS, OF OAK PARK, ILLINOIS, ASSIGNQR T0 JOHN- I. MARSHALL, OF CHICAGO, ILLINOIS.

BAKE-OVEN.

Specification of Letters Patent.

/ Application filed July 5, 1912. Serial No. 707,845.

incense.

Patented June 16, 1914.

To aZZ whom it may concern:

Be it known that I, JOHN FAULos, a subject of the Kingdom of Great Britain, and a resident of Oak Park, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Bake-Ovens, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to bakers ovens and more particularly to those having a fire brick hearth and a fire box located below the hearth. Insuch ovens the hearth serves for directly receiving the loaves to be baked, and it is therefore important that it shall not become distorted in use, as by the warping of beams used to support the hearth.

The present invention contemplates the use of steel beams for supporting the fire brick tiles which constitute the hearth, and the object of the invention is to provide means for effectively protecting these beams from the heat of the fire and thereby pre venting them from becomingwarped in use.

The invention is exemplified in the structure to be hereinafter described and which is illustrated in the accompanying drawin s, whereini igure 1 is a central upright sectional view of a bake oven embodying the features of construction provided by the invention; Fig. 2 is a detail perspective view showing the construction of the hearth and means for protecting the same; Fig. 3 is a perspective view showing one of the fire brick tiles used below the hearth; and Fig. 4c is a perspective view showing a form of bracket which may be used in the construction.

The fire box chamber of a well known type of bake oven is shown at 10. The bake chamber is shown at 11. The fire box chamber 10 is usually open at one end, as indicated at 12, whereby the products of combustion may escape into the space 13 below the floor 14 of the bake chamber 11. In bake ovens having the above features of construction, the floor 14 of the bake chamber 11 constitutes the hearth upon which the loaves are baked. This hearth is preferably made up of a plurality of fire brick tiles 15 fitted together to provide a smooth floor surface and supported upon a plnmlity of I-beams' 16. The I-beams 16 are uniformly spaced apart and extend from side to side of the oven structure. Their opposite ends may be supported in any convenient manner (not shown). For protectin the I-beams- 16 from direct exposure to the Iieat radiated from the roof of the fire box chamber 10 and to the products of combustion contained Within the space 13 below the hearth, a roof surface 17 is provided. This roof surface is preferably formed of closely fitting tiles l8, and is located below the lower anges, as 19, 20 of the Iebeams 16. For supporting the tiles 18, a plurality of inverted T-irons 21 are conveniently used. As shown't-hese T-irons are. extended transversely below the I-beams l6 and reach from end to end of the oven structure. They are most desirably uniformly spaced apart throughout their length to receive the tiles 18 between them.

Preferably the T-irons 21 are secured to the lower flanges 19, 20 of the I-beams 16. For this purpose brackets 22 may be employed. As shown, each of the brackets 22 has a T- slot 23 for receiving the lower flanges 19,

20 of one of the I-beams 16, and the brackets depend from these flanges for connection with the webs, as 21, of the T-irons 21, pref-. erably through the use of clamping bolts, as 25. During the erection of the oven a sufiicient number of the brackets 22 to provide supports for all of the T-irons 21, will be passed onto the lower flanges 19, 20 of each of the I-beams 16 from one end of the beam, before the I-beams 16 are secured in place.

After the I-beams 16 have been fitted in place and when it is desired to fit the T-irons 21, these brackets will be located at the required places by sliding them along the flanges 19, 20 of theI-beams to their respecti ve positions.

In forming the roof surface 17 a single continuous row of the tiles 18 is preferably fitted between each pair of adjacent T-irons 21, the opposite ends of the tiles 18 of each row being supported upon the flanges, as 26, 27, of the adjacent T-irons. To permit the tiles to be supported on these flanges while still serving to completely cover the T-irons against direct contact with the products of' combustion, the opposite ends of the tiles 18 are grooved. as indicated at 28, 29, Fig. 3, and the lower walls, as 30, of these grooves are of sufiicient length to extend to the mid width of the corresponding T-iron. In this way the tiles 18 provide asmooth'and unin; tcrrupted roof surface protecting theunder side of the I-beams 16, as also the T-irons 21, from direct contact with the heat of the fire.

As the T-irons have nothing to support but the mere weight of the tiles 18, they may be of such reduced size as not to require the grooves 28, 29 upon the ends of the tiles to be of unreasonable depth, while still permitting the ends of adjacent tiles to abut upon the mid width of the T-irons below the flanges 26, 27. The tiles 18 are thereby more effectually supported than if directly mounted upon the flanges 19, 20 of the I- beams 16. Furthermore the tiles 18 are spaced apart from the I-beams l6 and thereby permit the air space 31, which is inclosed between the tiles 15 and 18, to extend below the I-beams 16, to more efiectually protect the same. In order that this air space may be closely sealed against the entrance of the products of combustion from the space 13 thereinto, the opposite side edges of each of the tiles 18 preferably have complementary tongues and grooves, as indicated at 32, 33. It has been found that by the construction herein described, the I- beams 16 are effectually protected against being warped by the heat, and the floor of the hearth remains undistorted even after long continued use.

I claim as my invention 1. In a bake oven, in combination, two sets of parallel beams arranged at difierent levels one set extending in a direction transnecting each beam of the lower set with each of a plurality of said brackets at its lower end, and a plurality of tiles extending between and hanging from the flanges of adjacent beams of the lower set, the beams of the lower set and said tiles being spaced apart'from the foot flanges of the beams of the upper set.

.2. In a bake oven having a baking chamber and a heating chamber below the baking chamber, in combination, a hearth for the baking chamber, a set of fixed beams extending beneath and supporting the hearth, a set of removable beams extending transversely of and below the fixed beams, means independent of the hearth and slidable along the fixed beams, for detachab-ly connectin the removable beams to the fixed beams, and a roof for the heating chamber carried by the removable beams.

JOHN FAULDS.

Witnesses:

CHARLES B. GILLSON, E. M. KLAToHEn. 

